UIViewController view with transparent background in swift 3.0

Question

I present a viewController with a transparent background. But the components on this viewController are invisible when they are presented. An empty viewController is observed. I gave an alpha value and a black background color. This is my code when I call transparent viewController

if indexPath.row==0
{
   let modalViewController = PopUpViewController()
    modalViewController.modalPresentationStyle = .overCurrentContext
    present(modalViewController, animated: true, completion: nil)
 }

But on this controller there is an orange color UIView, invisible Thanks in advance  

Answer 1

You just need to submit your second Viewcontroller, which has a transparent background, modally. with the following configuration:

and what is the result:

for those who are not familiar with Opacity: in such a situation, for transparency, it is better to use Opacity instead of Alpha

Answer 2

( ) innerView (OrangeView), , . ( )

• viewController clearColor.
• OuterView .
• Segue Segue , .

.